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The PDQ-88b securitron is a large, monowheel robot with a titanium alloy housing, resistant to shrapnel and small arms fire. The PDQ-88b securitron is heavily-armed. Its left arm contains a GlastinghouseX-25 Gatling laser for medium range engagements. For close-range suppression and crowd control, the securitron mounts a 9mm machinegun in its right arm. However, these are only secondary weapons; concealed compartments in its shoulders contain M-235 missile launchers for long range and surface-to-air engagements, and a rapid-fire G-28 grenade launching system for close range engagements. The robots also have onboard auto-repair systems to repair any damage sustained from combat. Thus armed, a securitron can handle nearly any combat situation.

The PDQ-88b securitron produced by House Industries supports only two operating systems: Mk I and Mk II. The Mk I operating system lacks drivers for the auto-repair systems and explosive weapons, limiting the robot's arsenal to the built-in X-25 Gatling laser and the 9mm machinegun. The Mk II operating system enables the M-235 missile launchers, the rapid-fire G-28 grenade launching system, and the auto-repair system. As estimated by Mr. House and Yes Man, the upgrade improves the combat effectiveness of each securitron unit by 235%.

These are the models created by House Industries, the original creator of the PDQ-88b securitron, with the help of RobCo Industries. After the Great War, they are almost all controlled by Mr. House, and can be upgraded via the platinum chip.

* The securitron Mk I's on The Strip have a DT of 0. The securitrons in Freeside and inside the Lucky 38 have the normal DT of 20.* Mark 1s have grenade launchers instead of X-25s, and will use it frequently despite them supposedly not having the software drivers for them.

Through the use of the platinum chip, the Courier may upgrade the securitrons of Mr. House or Yes Man at The Fort and around The Strip to the Mark II operating system. The Securitron Mk II can use all the built-in weapons: the 9mm submachine gun, the rapid-fire G-28 25mm grenade launcher, the M-235 missile launchers, and the X-25 Gatling laser system. However, outside of the Lucky 38 basement demonstration, it only ever uses the last 3. It can also use the auto-repair systems, and its armor is increased. The unit's face is that of a Americansoldier wearing an M1 Combat helmet and smoking a cigarette.

They are a new line of securitrons created in Big MT by Doctor 0 and his team to surpass the PDQ-88b securitron created by House Industries and Robert House (the latter considered by 0 to be his greatest enemy). These efforts succeeded to a degree, as a Mk VI securitron operating system was developed. However, these never reached full production, and as of 2281, all of Big MT securitrons are either irreparably damaged or have gone berserk due to lack of maintenance for over 200 years, also now lacking any functional armor.

The face of the berserk PDQ-88b securitron unit is a distorted face, similar to the "angry moon" featured in the film A Trip to the Moon. The berserk model has the ability to use the rocket launchers in its shoulders and the laser in its arm, but not the grenade launcher or machine gun.

Securitrons in the Mojave Wasteland are the hands, eyes and soldiers of Mr. House. Notably, they patrol the Strip and guard its north entrance. Like all robots, securitrons cannot be pick-pocketed, and attempting to do so will just trigger the securitron to say one of their quotes. The Courier may upgrade the units to the Mark II operating system through the use of the platinum chip.

Those of Big MT, however, are all hostile to the Courier, with the exception of Muggy.

With a Science skill of 80 or greater, the Courier can input the following code when attempting to enter the New Vegas Strip: 1C 3C R34 M. This is "L33T-speak" for ice cream. "Ice cream" is also the code word used to identify third floor access at REPCONN headquarters.

When deactivated via the Robotics Expert perk, they will still move but cannot be interacted with. This is an issue present with many of the other robots in the game.

Outside of the Ultra-Luxe, three female NCR troopers are dancing in the water fountain, two in their underwear and the other wearing sexy sleepwear. Two securitrons will be telling them to leave, while getting more and more hostile. Eventually, two male NCR MP's will arrive and disperse the women.

Two securitrons can occasionally be seen outside of New Vegas Boulevard Station, puzzled by a piece of graffiti on the wall. They fire their Gatling lasers at it in attempt to clean it off, although this is futile and nothing actually comes off.

Securitrons seem to have police sirens in the opening cinematic. In-game, they do not ever actually use their sirens.

According to Father Elijah, they are said to have come from the Big MT.

If there is an NCR Ranger or trooper following the Courier, the securitrons by the Strip will shoot them.

Securitrons have a small plate just beneath their monitors that reads H&H Tool Company, implying a relation to Anthony House (Robert House's half brother).

Killing the securitrons at the Strip's gate will cause all securitrons to become hostile.

After upgrading the securitrons to the MK II OS, the securitrons attempting to convince the NCR troopers to get out of the fountain will still be running the MK I OS.

The securitrons at Big MT use the same Robco terminal symbols as Dr. 8, which can only be seen with the subtitles turned on. The securitrons will also make a beeping sound when this happens rather than Dr. 8's static sound.

It appears that they have the ability to switch AI "personalities" (I.E. Victor and Yes Man) from one Securitron to any other, as Victor is seen welcoming the Courier if he goes to the Strip via NCR Monorail, and then immediately switching back to a standard Securitron guard robot AI.

pcps3xbox360 While inside The Strip, if you kill a securitron with a head shot and destroying its TV monitor, the screen will still be present but the surrounding edges around the screen shows that the screen was destroyed. [verified]

xbox360 The securitrons may sometimes keep swapping weapons without even attacking the enemy. [verified]

pc When passing the Science check with the securitron gatekeeper, and talking to it again saying goodbye, the securitrons might turn hostile while attempting to enter the Strip. [verified]

ps3pcxbox360 It is possible that opening Mr. House's Antechamber may only cause a couple of his securitrons in his penthouse to become hostile, even after destroying some of them. [verified]

xbox360 Its possible that none of the securitrons will become hostile when opening Mr. House's antechamber. [verified]

pcxbox360ps3 The securitrons at the Battle of Hoover Dam (if you fought for an independent New Vegas) will not switch from their shoulder mounted rocket launchers, often blowing themselves up within minutes of the battle. However, if you side with House, this does not happen. [verified]